How do I stop Soft Body from glitching?
Hey it's been a while with no response, so I figure I'll post my alternative in case anyone else sees this with the same issue. While soft body is nice because it updates quickly in real time, that's not a required feature for a project that you'll be rendering to video. 

I was able to achieve nearly identical results using a cloth sim, without any glitched frames during renders. I just turned off the soft body, turned on cloth, and used the same vertex group I had for the soft body sim. Then I turned the stiffness down to match the settings I had before and placed the cloth modifier ahead of the subsurface modifier and baked the simulation. This worked for what I needed it to do, and solved the issue of the mesh jumping around and glitching.